I experiencing always that after a long session (say 2 hours) the HUD freezes for some tables. Hands are not updated in the HUD and if a new player shows up the stats of the previous player kept displayed.
When HM2 is closed and then restarted the HUD does not show up at the tables where it froze before the restart.
But when I leave the table and then rejoin or go to another table when the HUD froze then the HUD does show up.
I play at titan poker